TECTONIC HAZARDS

    Cards (20)

    • Focus
      Point below the Earth's surface where the rocks give way in an earthquake
    • Epicenter
      Point directly above the focus where the earthquake hits worst
    • Plate boundary
      Also known as plate margins, where two or more plates meet and there is more tectonic activity
    • Richter Scale

      Outdated measure of the magnitude or strength of an earthquake
    • Seismometer
      Machine that measures the vibrations from an earthquake
    • Types of plate margins
      • Destructive
      • Constructive
      • Conservative
    • At destructive plate boundaries, two plates move towards each other, often forming fold mountains or subduction
    • At conservative plate boundaries, two plates move side-by-side, building up pressure that can lead to powerful earthquakes
    • Natural hazard
      Natural event that is a threat to property and a threat to people
    • Earthquakes occur at all types of plate margins
    • The San Andreas Fault is a conservative plate boundary, so it does not have active volcanoes
    • Plate margin types
      • Constructive
      • Destructive
      • Conservative
    • Constructive plate margins have plates moving apart, forming rift valleys and shield volcanoes
    • Destructive plate margins have plates moving together, causing subduction and composite volcanoes
    • Conservative plate margins have plates moving side-by-side, with no magma and no volcanoes
    • Tectonic plates do not move side-by-side at destructive plate margins, that happens at conservative plate margins
    • Tectonic plates move towards each other at destructive plate margins
    • Tectonic plates do not move away from each other at conservative plate margins, that happens at constructive plate margins
    • Volcanoes and earthquakes are found at destructive plate margins
    • Plate margins are areas with a high risk of volcanic eruptions
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